Wrench.



PATENTED JAN. a, 1907.

C. R. RAWDON.

WRENCH.

APPLIoATIoN FILED 001215, 190e.

L m N FN n Q G 0 .S S lFOd ...Ud m a No u WD@ v .IDH S Mba m Umd C lnlu 7,0!

PATEN'IED JAN. 8, 1907.

C. R. RAWDON.

WRENCH.

APPLICATION FILED 00115'. 190e.

2 SHEETS-SHEET 2.

lnuenaorf EL@ Charles RRawdCm Abt'y's.

by www www' Wihneas @ffm UNITED STATES PATENT oEEroE., CHARLES n. nAwDoN` or' Sriiiiouis, MTSSO'URI.

WRENCH.

Specification of Letters Patent.

Patented Jan. s, 1907.

Auplicaton tiled October 15.1906. Serial No. 339,073.

Be it known that l, Cuantas It. RAwnoN, a citizen of the United States, residing at St. Louis, h'lissouri, have invented a certain new and useful lmprtwement in Wrenches, of which the following is a full, clear, and exact description, such as will enable others skilled in the art lo which. it apportains to make and use the same, reference being had to the accompanying drawings, forming part ol' this specification, in whic-h- Figure 1 is a side elevation oll a wrench embodying the features of my invention. Fig. 2 is a horizontal sectional view taken on about the line 2 2 of Fig. 1` Fig. 3 is a detail top plan View showing the handle on theI con trolling-valve. Fig. 4 is a. detail sectional View showing the valve adjusted in position for causing the motive fluid to rotate. the shaft forwardly. Fig. 5 is an enlarged vertical sectional View Fig. 6 is a cross-sectional View taken on the line (5 6 of Fig. 5, and Fig. 7 is a detail perspective View of a portion oll the adj listing-sleeve for the gripping-jaws.

rlhis invention relates to wrenches.

'The object ol my invention is to provide a wrench comprising a nut-engaging member and means actuated by compressed air or any suitable fluid under pressure l'or imparting rotary movement to the nut-engaging meluber.

Another object of my invention to provide a wrench of' the character described comprising means for causing the nut-engaging member to be rotated either lor 'ardly or backwardly.

'Other desirable features of my improved wrench will be hereinafter pointed out.

Referring to theI drawings, which represent the preferred form of' my invent ion. 1 designates a casing having a shaft or stock 2 jour-l naled therein, sa1d shaft projecting through the bottom wall 3 of the casing.` Connected to the lower end of the shalt .2 is a nut-engagmg member, which ma)r be of an)Y suitable construction, and secured to that: portion of exhaust through whiehthe motive fluid escapes, said openings being formed, respectively, in laterally-extending projections 5 and 6 on the easing. A Valve 7 is mounted in the projection 5 at the point where the inlet-opening 8 merges into two oppositoly-inclined branches 9 and 10, so that when the' valve is adjustedin one position the pressure ot uthe motive fluid on the blades will cause the shaft to rotate in one direction and when the valve is adjusted in a diflierent position the pressure of the fluid on the blades will .ause the shaft to be rotated in the opposite direction. Handles 11 and 11a7 provided with central bores or passage-Ways 12, are secured to the proj eetions 5 and 6, and a flexible tube 13, for coiulucting the compressed air or other motive fluid. to the casing, is connected to the outer end of handle l1. The valve which controls the passage of the motive fluid to the casing majT be ol' any desired design; but l prefer to use oney of the construction shown in Figs. 1 to 4, having a handle. 14, provided with av downwardly-extending lug 15, to which a leal-spring 1G is secured, the other enel ol' said spring being fastened to the projection 5 on the casing. ,f'llhe operator can move the handle 14 t y -right or left to cause the port 17 in the yllve to aline with either rotated forwardly, thereb)Y causing the .nut-

suitable forni; but l prefer to use the construction shown in Fig. 5, which consists of a plurality of. jaws 19, formed integral with Shanks A 20, that are pivotally connected at their inner ends ,to ablock 21, which is fasb .The nut-engaging*inelnber may be of any 'tened by ebelt 22 te the lower end' of the wardly some distance beyond shaft 2'; Byvusng a nutengagngmember of this construction- I am able to remove or apply a 'nut from' ar bolt that Erojects outtfe top of the nut, as shown in dotted lines in Fig. 5i i' .Each jaw-shank consists of astaig'ht poru tion and an outwardly-extending' inclined portion,` the straight portions of 'the jaW= shanlrs'being. located in a socket or opening. "formed in the .block 2l.

The jaws are normally' forced apart by a spring; connected to the block 21 and consisting `of four arms 23,

' Which bear against the shanksl ot. the jaws.

As. shown in Figs; 5 and 6, the i'nner'facesf distancethe 'threads thereon will pass out of engagement with the threads on the block 21 and said sleevecan then'be forced downwardly, so that the."inwardly-projecting..`

flange 26 at its lowerend will engage the in'-, clined portions of the Shanks-ofthe jaws and .cause said jaws to be forced. toward each rother for engaging a nut or similar object. After the jawshave firmly graspedthe nut the sleeve isrotated slightly to cause its-- threads to mesh with the threads onthe'block 21, and thuslock the sleeve: and jaws in posi- A aid in confiningthe motive `fluid behind the Preferably thewings-or-blades4-consist of two plates connected together and provided at their inner ends witlrflanges 27, through which fastening; devices extend Lto. connect the. wingsor-blades to the hexagonalportion of the shaft 2, ythat is located inside of the ca sl ing, the outer-ends of the plates beingbent in opposite directions to form cups 4, which having an` interior mutilatedy thread.

wings until they have passed the voutlet openingror exhaust. I

he top `Wall 28' of the casing, which is 're- .movable, is provided With'a bearingfor the pp'erend of the shaft v2, said bearin having @tapered walls and the upper end of t e shaft being reduced as shown in Fig. 5^,.to form a track for bal -bearings 29., A stuffingbox provided with a gland v30is secured -to the ottoni wall of the casingand surrounds the shal'trZ, and a bearing 31, containingballs 32, is fastened to the gland-nut 33.

fFrom the foregoing description it lwill be` seen that I have provided a wrench by which.

a nut can be screwed Vonto or removed from a bolt in a fraction ofthe time it would .take a.

workman to manually perform the operation.

' While the device hereinshown representsthe preferred form of my invention, l'twillof course be understood that various changes could be made therein without departing Afrom the spirit of my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isi A wrench comprising a casing, having at) shaft projectingoutwardly therefrom, means 'connected to the shaft inside oi' the casing for causing the shaft to turn when fluid, under pressure is introduced into thecasing, a blockconnec'ted to the 4lower end ofsaid shaft. and

prosid'edwith a central recess, jaws providedy with Shanks which extend into .said recessl and are pivotallyconnectedto the block, an adjustingrsleeve slidingly` mounted on said block and mutilated t mutilated thread on the exterior ofthe block,v

p'iovided on it'sdinterior Withersl ead whichjcoperates mth a.

and. yielding means for forcing said jaws-- apart; substantially as described -In testimony whereof I hereugto aiiix my signature, in the presence of witnesses,

this 11th day of October, 1906.

CHARLESR; RAWDON. Witnessesz WELLS L. CHURCH, GEORGE BAKEWELL 

